As yet another alternative, you could make all of these terms that you want to get a child of another term. For instance, if you make a parent term called "Numbers", with id of 5, and assign all of the "numbered" terms as a child of this term, you could do:

get_terms( 'movies', array( 'parent' => 5 ) );

Obviously, the success of either strategy is dependent upon your use case. The first alternative is rather expensive, but with a nice caching strategy really shouldn't be an issue. The second method requires structuring data differently that may or may not work for your situation.